Daniel Campbell focuses his practice on commercial litigation matters, including collective and class actions, trade secret misappropriation actions and products liability actions.

Show More


  • Defeated motion for class certification, obtained disqualification of plaintiffs’ retained expert witness and obtained summary judgment for James Hardie Building Products Inc. on claims brought by 13 plaintiffs alleging that fiber-cement home-siding product possessed an alleged defect that led to premature deterioration of the siding
  • Co-chaired, and prevailed in, evidentiary hearing on motion for preliminary injunction in trade secrets case alleging theft of software and source code trade secrets where plaintiff alleged more than $120 million in damages – cross examined plaintiff CEO and directed key expert witness at hearing in obtaining favorable result
  • Represented a pharmaceutical and therapy services client in case involving alleged theft of trade secrets and breach of confidentiality agreements

Show More


  • Super Lawyers Illinois, Rising Star, 2019-2020
  • McDermott Will & Emery, Professional Development Outstanding Mentor Award, 2017
  • McDermott Will & Emery, Outstanding Achievement and Commitment to Pro Bono and Service in the Community Award, 2017
  • University of Illinois College of Law, Rickert Award for excellence in trial advocacy


University of Illinois College of Law, JD, magna cum laude, 2013
University of Missouri, BA, summa cum laude, 2010


Courts/ Agencies
US Court of Appeals for the Seventh Circuit
US Court of Appeals for the Eighth Circuit
US District Court for the Central District of Illinois
US District Court for the Northern District of Illinois (trial bar)
US District Court for the Western District of Wisconsin

Daniel Campbell

Insights & Events / Media

America / On the Subject / February 7, 2019

On the Subject / November 21, 2016

Illinois Institute for Continuing Legal Education Class Actions Handbook 2015 Edition / October 2015